#container {
    position: relative;
    height: 90vh;
    width: 90vh;
    float: left;
}

#container canvas {
    border: 1px solid black;
    width: 100%;
    height: 100%;
    position: absolute;
    left: 0;
    top: 0;
}

#operation {
    float: left;
}

#operation:after {
    content: '';
    clear: both;
    display: block;
}

#operation > div {
    width: 50px;
    height: 50px;
    margin: 5px 10px;
    border: 1px solid #999;
    background-color: #eeeeee;
    text-align: center;
    box-sizing: border-box;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

#operation > :first-child {
    margin-top: 0;
}

#operation > div.select {
    background: #999999;
    border: 1px solid #333;
}

#operation .tip {
    font-size: 8px;
    color: red;
}

.debug {
    border: 1px dashed #666;
    min-width: 200px;
    min-height: 200px;
    float: left;
    margin-right: 10px;
}

.debug div {
    background-color: #eeeeee;
    height: 25px;
    line-height: 25px;
    padding: 5px 0;
}

.debug div:nth-child(odd) {
    background-color: #FFF6E1;
}

#operation #separator {
    border: none;
    height: 20px;
    background: none;
}
